Reminds me of people who want to be well traveled and experience different cultures and then get upset because the food, culture and language is not American, English, etc! They want to experience differences without risking the familiar.

On board ship, you still have opportunities to try something different IF you chose. If the ships become 'floating' malls with the same 'stuff' you can get back home, that small choice is then lost...so what's the point?